Reamer



Patented Oct. 20, 1925.

UNITED STATES MICHAEL L. snr'ron AND nonnnn HEYER, or OLLYWOOD,CALIFORNIA.

' REAM'ER.

Application filed May 6, 1824. Serial No. 711,426.

To all whom it may concern:

Be it known that we, MICHAEL L. SUTTON and DONALD HEYER, citizens of theUnited States, residing at Hollywood, in the county of Los Angeles,State of California, have invented certain new and useful Improvementsin Reamers;. and we do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in tools, andparticularly to reaming tools.

One object of the invention is to provide a reaming tool which has novelmeans for adjusting the cutters for differently sized openings, andnovelmeans for holding the cutters in such adjusted positions.

Another object is to provide an adjusting means for moving the cuttersinwardly or outwardly, and which is operable without permitting thecutters to become disengaged from the holder.

Other objects and advantages will be ap parent from the followingdescription when taken in connection with the accompanying drawing.

n the drawing:

Figure 1 is an elevation of a reaming tool made in accordance with thepresent invention.

Figure 2 is a vertical longitudinal sectional view through the tool, oneof the blades being removed, and shown in dotted lines.

Figure 3 is a transverse section on the line 33 of Figure 2, one of theblades being removed.

Figure 4 is a transverse sectional view on the line 44 of Figure 2, oneof the blades being removed.

Referring particularly to the accompanying drawing, 10 represents thecutter holder which is in the form of a tube with its opposite endsreduced in diameter and externally threaded, as shown at 11 and 12,respectively. Formed integrally with the holder, and arranged centrallytherewithin,

is a wall 13, having a central opening 14, to which reference will bemade later herein. Formed longitudinally in the wall of the tubularholder 10, and with slight spiral inclinations, are the slots 15, theouter ends of which extend into the reduced end portions of the holder,while the inner ends are connected by the longitudinal grooves 16 formedin the wall 13.

Each of the cutters is in the form ofan elongated blade 17 having itsends beveled, as shown at 18, and with the angular recess 19 in itsgroove entering edge. Into this recess enters the wall 13, which theportions at each end of the recess pass-into the slots 15. The beveledend portions of the cutter extend out onto the reduced ends of theholder.

Disposed longitudinally through. the holder, and through the openingld,of the wall, 13, is a spreader bar or shaftrepresented as a whole by thenumeral 20, the ends of said bar being reduced indiameter,

as shown at 21 and 22, the former being threaded, while the latter isprovided with a smooth exterior. tion of the bar 20 is cylindrical, at20, and it is this portion which is loosely received in the bore of thewall 13. V r the bar, between this portion 20, and the threaded end 21is tapered toward said threaded end, as shown at 22, for engagement withthe correspondingly tapered or inclined portion of the innerlongitudinal face of the cutter, as shown at 28. The portion between theother end of the cylindrical portion 20, and the reduced end 22 istapered at 22", in the direction of the cylindrical portion. The largerends of these tapered portions produce shoulders 24 and 25,respectively. It will be noted that the portion ofthe inner longitudinalface of the cutter, at the other side or endor the recess 19, isinclined to correspond to the taper of the portion 22, and slidablycontacts therewith, as clearly seen in Fig. 2.

Threaded on the end 21, of the spreader bar 20, is a nut 26, the innerend of which has a peripheral outstanding flange 27 which bears againstthe adjacent end of the cutter holder 10, when screwed home. The outerend of the nut 26 is provided with wrench. faces 26', to permit the nutto be turned. Slipped on' the stem of the nut 26 is a nut 28, whichengages with the threaded end of the holder 10. to maintain the nut 26tightly against the said end of the holder. The flange of the nut 28 isbeveled tooverlie or bear against the beveled end of the cutter 17, tomaintain said end of the cutter within the slot of the holder. Threadedonto the other end of the holder 10 is a similar nut 29, the stem 22being received centrally therethrough, as seen in the drawing. The

The intermediate ,por

The portion of i flange of this nut 29 is beveled to bear against thebeveled ends of the cutters, to retain said ends in the slots.

When it is desired to move the cutters outwardly, as when a largeropening is to be reamed, the nuts 28 and 29 are backed ofl sufficientlyto partially release the beveled ends of the cutter blades, when theoperator rotates the nut 26 inwardly against the adjacentend of theholder 10, with the result that the spreader bar 20 will be drawn towardthat end of the holder causing its tapered portions 20 and 22' to rideon the inclined faces of the cutter blades to push said blades outwardlythrough the slots 15. When the blades have been moved out to the desireddistance, the nut 28 and the nut 29 are screwed inwardly until theirbeveled flanges firmly engage with the beveled ends of thecutter blades,whereby the blades are firmly held in their adjusted position.

l/Vhen the cutter is to be adjusted for a smaller opening, the nuts 28and 29 are 'again backed off, and the nut 26 turned outwardly, whichpermits the spreader bar to move toward the other end of the holder 10,whereupon the inclined faces of the cutters will slide down on thetapered portions 20' and 22, and move into the slots 15.. Upon turningthe nuts 28 and 29 toward the ends of the holder 10, the beveled flangesof said nuts will bear against the beveled ends of the cutter blades,and firmly hold the blades in position.

What is claimed is:

An expanding reamer including a longitudinally slotted holder having aninterme diate transverse wall in each slot, cutter blades disposed inthe slots of the holder and having inner inclined faces and outerbeveled ends, the intermediate portion of the inner edge of each cutterblade having against the adjacent end of the holder "for moving the barto adjust the blades through the slots of the holder, said nut beingretained in position by one of said holder engaged means.

In testimony whereof, we ahix our'signatures.

MIKE L. SUTTON. DONALD HEYER.

